### About the ProB Logic Calculator

This is an online calculator for logic formulas. It can evaluate
predicates and formulas given in the B notation. Under the hood, we
use the ProB
animator and model checker. The above calculator has a time-out of
2.5 seconds, and MAXINT
is set to 127 and MININT
to -128. You can also download
ProB for execution on your computer, along with support for B, Event-B,
CSP-M,
TLA+, and Z.